(WTXF/AP) - The flood threat we had on Saturday is continuing at least through Sunday.

In the morning, east central New Jersey and other parts of our region got inches of rain because of a storm cell sitting over the area.

There were flood advisories Sunday morning. They’ve expired for now.

Our weather should be muggy, humid and oppressive for much of the next the next 48 hours.

Sunday’s the best weather should be midday. We’ll have hazy sunshine.

Then, look for hit-and-miss showers and storms in the afternoon and the evening, but not as widespread as Saturday. Some of them will be slow-moving and flash flooding will be a major concern.

The National Weather Service has issued a flash flood watch for portions of central, northern and northeastern New Jersey through Monday evening. The affected areas include Mercer, Middlesex, Morris, Somerset, Sussex, Warren and Hunterdon counties.

Also, the start of the NASCAR Sprint Cup race at Pocono Raceway is being delayed by rain. And the game between the Philadelphia Phillies and the Atlanta Braves resumed after a 24-minute rain delay.

Saturday afternoon, flash flooding hit Mercer County with up to 6 inches of rain around Princeton and West Windsor. There were numerous stranded vehicles and water rescues. Princeton Junction was under water for a time.

Click here to watch how some Mercer County roads flooded quickly on Saturday. West Windsor police say abandoned vehicles from the storm were towed to either Al’s Sunoco 799-2252 or Grovers Mill Towing 799-2076. There will be a fee for the towing services.

We could actually have 7 to 10 inches of rain over the next three days.

To our south, in Maryland, historic, low-lying Ellicott City was ravaged by floodwaters Saturday night, killing at least one person and causing devastating damage to businesses, officials said.

Andy Barth, a spokesman for Howard County Executive Allan Kittleman, told The Associated Press that two other people were missing after the town received more than 6 inches of rain, most of it between 7pm and 9pm.

The body of a woman was recovered from the Patapsco River early Sunday, Kittleman told WBAL-AM.

Gov. Larry Hogan was touring the damage Sunday and declared a state of emergency, which will allow greater aid coordination and assistance.

Videos posted on social media showed floodwaters rushing down the town's Main Street, which slopes toward the river, and sweeping away cars. Some vehicles came to rest on top of each other. Kittleman said the devastation was the worst he'd seen in 50 years living in the county, including Hurricane Agnes in 1972, which caused the river to overflow its banks.

"This is by far the worst devastation Ellicott City has seen in decades," Kittleman told WBAL-AM.

Barth said all of the businesses along Main Street sustained extensive damage.

"In almost every case catastrophic, just gutted," he said. "Everything in it has been swept out. All of the glass is broken, many of the sidewalks are out. It's hard to believe."

Barth said bystanders helped rescue some motorists who were at risk of being swept away while inside their cars, forming a human chain in at least one instance.

Jason Elliott, a meteorologist with the National Weather Service in Sterling, Virginia, said the town was hit by a series of strong thunderstorms that dumped heavy rain over a 2-hour period. Other areas nearby received heavy rainfall for only about 30 to 45 minutes, he said.

"It's just a matter of the heavy rain being that long in duration. It just happened to set up over that area," Elliott said.

With so much rainfall, there was nowhere for it to go other than the street.

"Everything funneled toward that Main Street area. There's hills on both sides, the river's on the third side," Elliott said. "In this case the Patapsco River was coming up, too. We believe there's some contributions to the flood from both directions."

Ellicott City was established in 1772 as a mill town along the Patapsco, and many 18th and 19th-Century buildings were still intact before Saturday's floods. Once a home to mill workers, in recent decades it has become known for restaurants, art galleries, antique shops and nightlife. Main Street slopes dramatically toward the river and has long been susceptible to flooding.

The county courthouse and government headquarters are located in Ellicott City but are on higher ground.

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